ELASTIC BEHAVIOUR OF MATTER UNDER VERY HIGH PRESSURES : Considerations of Instability

Abstract

Basing on earlier work of Bhagavantam and Chelam on the elastic behaviour of matter under high pressures wherein an effective elastic energy expression was introduced, it has been shown that the positive definiteness of this expression signifies elastic stability. Since the coefficients in this energy expression have been worked out, it may be expected that this would provide a convenient approach for determining the elastic instability in any system subjected to large strains.